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The nRF51822 is a powerful, highly flexible multi-protocol SoC ideally suited for Bluetooth® low energy and 2.4GHz ultra low-power wireless applications. The nRF51822 is built around a 32-bit ARM® Cortex™ M0 CPU with 256kB flash + 16kB RAM. The embedded 2.4GHz transceiver supports Bluetooth low energy as well as 2.4GHz operation, where the 2.4GHz mode is on air compatible with the nRF24L series products from Nordic Semiconductor.

nRF51822 also incorporates a rich selection of analog and digital peripherals that can interact without CPU intervention through the Programmable Peripheral Interconnect (PPI) system. A flexible 31-pin GPIO mapping scheme allows I/O like serial interfaces, PWM and quadrature demodulator to be mapped to any device pin as dictated by PCB requirements. This enables complete design flexibility associated with pin-out location and function.

nRF51822 supports Bluetooth low energy protocol stacks as well as 2.4GHz protocol stacks, including Gazell, both available free of charge. nRF51822 requires a single power supply and gives the user the option of using on chip linear regulators giving a supply range of 1.8-3.6V, a direct 1.8V mode and a on chip DCDC buck converter giving a supply range of 2.1-3.6V. The use of the DC-DC converter can be dynamically controlled during run time and enables nRF51822 to operate at radio peak currents below 10 mA @ 3V supply (TX @ 0 dBm & RX).

Core51822 Specifications

Onboard chip: nRF51822

Communication distance (open outdoor@1M data rate): 30m

Frequency range: 2.4GHz

Operating voltage: 2.0V ~ 3.6V

Operating temperature: -40℃ ~ 85℃

Dimension (PCB): 24.5mm x 32.26mm

Expansion pinheader: all the I/Os except P0.26 and P0.27

Pinheader pitch: 2.00mm

Spacing between pinheaders on the left side and the right side: 18.00mm

Antenna: onboard antenna

nRF51822 Features

2.4 GHz multiprotocol RF transceiver

ARM® Cortex™-M0 32 bit processor

128 bit AES HW encryption

256kB flash & 16kB RAM

Programmable Peripheral Interconnect (PPI)

Digital interfaces: SPI, I2C, UART

10 bit ADC

Programmable output power: -20 to +4 dBm

Independent application development and protocol stack

Fully compatible with NRF24L series

Pinout compatible with NRF51xxx series

Global separate power management

Operating voltage: 1.8 V ~ 3.6 V

nRF51822 Applications

Wearable devices

Bluetooth intelligent application

Mobile phone accessories

RFID labels

Smart home appliances

Industry control

Data acquisition system

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